文件列表:

LICENSE (35149, 2020-11-02)
hardware (0, 2020-11-02)
hardware\Gerber_PCB.zip (112011, 2020-11-02)
hardware\pcb_easyeda.json (363947, 2020-11-02)
hardware\schematic.pdf (97776, 2020-11-02)
hardware\schematic_easyeda.json (100164, 2020-11-02)
software (0, 2020-11-02)
software\opengc_counter (0, 2020-11-02)
software\opengc_counter\opengc_counter.ino (2216, 2020-11-02)
software\opengc_psu (0, 2020-11-02)
software\opengc_psu\opengc_psu.ino (1668, 2020-11-02)

# Open Geiger Counter Open hardware for a simple all-in-one geiger counter design using a GMT like the popular SGM-20. Hardware design has been done in EasyEDA and all the needed files for you to import the project as well as a schematic can be found in the hardware folder. There is also a gerber file available for direct pcb manufacturing. Software aims to be as simple as possible to understand and maintain; to achieve this the two ATTiny84s can be programmed using the ArduinoIDE and a popular AVR ICSP programmer like the USBasp. `opengc_psu` is the sketch for the geiger power supply, that's the MCU near the inductor. And `opengc_counter` is the main detector which is just the other ATTiny chip on board. In order for the code to work you will need following two libraries: * [NicoHood/PinChangeInterrupt](https://github.com/NicoHood/PinChangeInterrupt) * [datacute/Tiny4kOLED](https://github.com/datacute/Tiny4kOLED) To compile and program sketches for any ATTiny microcontrollers you will also need [SpenceKonde/ATTinyCore](https://github.com/SpenceKonde/ATTinyCore). Before you push this to your MCU be sure to select the right chip (ATTiny84a without bootloader), optionally choose a BOD level and use following clock speeds: * PSU: 1 MHz (I found this to be the best speed for psu stability) * Counter: 8 MHz, just the fastest without an external crystal Also don't forget to check the pin orientation of your programmer! Select your programmer and if you've done everything right and plugged in a geiger tube the counter is ready to go. The display will show the battery voltage and counts per minute (evaluated over a span of 3 seconds default). You can reset the counter with one button and mute/unmute the buzzer with the other (saved on reboot). Additionally, you can alter `REFRESH_INT` in the counter sketch to change the cpm refresh interval, and the `TARGET_V` in the psu sketch if you need a different voltage for your specific geiger tube. Please note that this is not a professional geiger counter by any means. It will never be as sensitive to radiation as if you put the same tube in a commercial device. The hardware, most importantly, the transistor pull down is pretty crude in conjunction with the ATTiny84 - some pulses are just way to fast to create a _nice_ logic low for the MCU to register. Suggestions are highly appreciated of course. Oh and obviously don't touch the board if it's powered on, the PSU can deliver 500+ Volts DC (@some uA)!

近期下载者：

相关文件：

评论：[我要评论] [举报此文件]

收藏者：